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| Titel |
The topographic signature of Quaternary tectonic uplift in the Ardennes massif (Western Europe) |
| VerfasserIn |
N. Sougnez, V. Vanacker |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 15, no. 4 ; Nr. 15, no. 4 (2011-04-04), S.1095-1107 |
| Datensatznummer |
250012738
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| Publikation (Nr.) |
 copernicus.org/hess-15-1095-2011.pdf |
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| Zusammenfassung |
| Geomorphic processes that produce and transport sediment, and incise river
valleys are complex; and often difficult to quantify over longer timescales
of 103 to 105 y. Morphometric indices that describe the
topography of hill slopes, valleys and river channels have commonly been
used to compare morphological characteristics between catchments and to
relate them to hydrological and erosion processes. This study aims to
analyze the link between tectonic uplift rates and landscape morphology
based on slope and channel morphometric indexes. To achieve this objective,
we selected 10 catchments of about 150 to 250 km2 across the Ardennes
Massif (a Palaeozoic massif of NW Europe, principally located in Belgium)
that cover various tectonic domains with uplift rates ranging from about
0.06 to 0.20 mm yr−1 since mid-Pleistocene times. The morphometric
analysis indicates that the slope and channel morphology of third-order
catchments is not yet in topographic steady-state, and exhibits clear
convexities in slope and river profiles. Our analysis indicates that the
fluvial system is the main driver of topographic evolution and that the
spatial pattern of uplift rates is reflected in the distribution of channel
steepness and convexity. The spatial variation that we observe in slope and
channel morphology between the 10 third-order catchments suggests that the
response of the fluvial system was strongly diachronic, and that a transient
signal of adjustment is migrating from the Meuse valley towards the
Ardennian headwaters. |
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